The VUS is a solid-state flow sensor incorporated into the SoniQ ultrasonic flow sensor (photo). The medium simply flows through a straight stainless-steel tube, and ultrasonic transducers positioned on the outer surface of the pipe measure the fluid flowrate. The fluid does not make contact with the transducers, and the device has no moving parts, making it suitable for applications where paddle wheel sensors cannot be used. Three output signals are provided: frequency, analog (4 – 20 mA) and alarm. The device covers the flow range from 1.5 to 30 L/min, and is suitable for water and non-conductive aqueous solutions. — SIKA Dr. Siebert & Kühn GmbH & Co. KG, Kaufungen, Germany